> Healthy people will have dramatically lower medical bills throughout their life, so why shouldn't they get discounted health insurance?

I never said they shouldn't. It's just a topic totally unrelated to whether or not people are forced to buy insurance, and I'm not interested in discussing that new, unrelated topic.

> Billy has to admit he just hates exercising.

This logic breaks down when Billy actually exercises and eats just fine, but was nonetheless born to a suboptimal combination of parents.